Book Em – Penalty Cards
A referee’s yellow and red card in your pocket, and an experiment in shipping an app to both stores.
- Role
- Design and code, solo
- Platform
- iOS and Android
- Stack
- Expo, React Native, EAS
- Timeline
- May to June 2026
- Status
- Live, v1.1.0
To celebrate the World Cup and to learn how to ship an app on both iOS and Android, I built a simple fan app to throw yellow or red cards at live matches, watch parties, or from the comfort of your living room. I learned a ton about the process for both the App Store and Play Store. The experiment has set me up for current and future projects that will soon come to iOS or both platforms. Feel free to download Book Em; it’s free! 😉
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